I have an interesting problem. I picked up a used pure sine wave inverter, bench tested it and seem to work just fine. I installed it and power it up and it's tripping an older GFCI that is on the boat about 5 seconds after throwing the power. Even when there's nothing plugged into the GFCI. I used my meter to test the inverter output. Both the voltage and and frequency is spot on. The inverter turns out was not bonded internally but that shouldn't matter. I bonded it at the panel temporary and the GFCI won't reset. I transferred back to shore power and took out the Shore power GFCI. Now I ran out of daylight.

I'm gonna pull the boat's GFCI tomorrow and remove my temp bond at the panel. It appears to be the inverter because the GFCI circuit in question works fine on shore power. How can a power source trip a GFCI, down line? My only thought the GFCI is bad but nothing happens to it on shore power. The only common denominator is the used inverter


"Live Awesome!" - Kevin Carosa